Allow to customize app host/port (#181)

Allow to use custom hostname and/or port value for app container from the Web
container. Usefull for some people using containers provider (eg. #142)

web/entrypoint.sh

@@ -1,9 +1,22 @@
 #!/bin/bash
+
+# Define default value for app container hostname and port
+APP_HOST=${APP_HOST:-app}
+APP_PORT_NUMBER=${APP_PORT_NUMBER:-80}
+
+# Check if SSL should be enabled (if certificates exists)
 if [ -f "/cert/cert.pem" -a -f "/cert/key-no-password.pem" ]; then
   echo "found certificate and key, linking ssl config"
   ssl="-ssl"
 else
   echo "linking plain config"
 fi
+# Linking Nginx configuration file
 ln -s /etc/nginx/sites-available/mattermost$ssl /etc/nginx/conf.d/mattermost.conf
+
+# Setup app host and port on configuration file
+sed -i "s/{%APP_HOST%}/${APP_HOST}/g" /etc/nginx/conf.d/mattermost.conf
+sed -i "s/{%APP_PORT%}/${APP_PORT_NUMBER}/g" /etc/nginx/conf.d/mattermost.conf
+
+# Run Nginx
 nginx -g 'daemon off;'

web/mattermost

@@ -18,7 +18,7 @@ server {
         proxy_buffers 256 16k;
         proxy_buffer_size 16k;
         proxy_read_timeout 600s;
-        proxy_pass http://app:80;
+        proxy_pass http://{%APP_HOST%}:{%APP_PORT%};
     }
 
     location / {
@@ -34,6 +34,6 @@ server {
         proxy_buffers 256 16k;
         proxy_buffer_size 16k;
         proxy_read_timeout 600s;
-        proxy_pass http://app:80;
+        proxy_pass http://{%APP_HOST%}:{%APP_PORT%};
     }
 }

web/mattermost-ssl

@@ -34,7 +34,7 @@ server {
         proxy_buffers 256 16k;
         proxy_buffer_size 16k;
         proxy_read_timeout 600s;
-        proxy_pass http://app:80;
+	proxy_pass http://{%APP_HOST%}:{%APP_PORT%};
     }
 
     location / {
@@ -51,7 +51,7 @@ server {
         proxy_buffers 256 16k;
         proxy_buffer_size 16k;
         proxy_read_timeout 600s;
-        proxy_pass http://app:80;
+	proxy_pass http://{%APP_HOST%}:{%APP_PORT%};
     }
 }